Reviewed by Dimitri Glazkov.

        Implement DragImage functionality for chromium/mac.
        https://bugs.webkit.org/show_bug.cgi?id=37069

        * page/chromium/DragControllerChromium.cpp:
        (WebCore::DragController::maxDragImageSize):
        Use a max size of 400x400 on OS X.
        * platform/chromium/DragImageChromiumMac.cpp:
        (WebCore::dragImageSize): Implement.
        (WebCore::deleteDragImage): Implement.
        (WebCore::scaleDragImage): Implement.
        (WebCore::dissolveDragImageToFraction): Implement.
        (WebCore::createDragImageFromImage): Implement.
        * platform/chromium/DragImageRef.h:
        Use CGImageRefs as DragImageRef on OS X.
2010-04-06  Nicolas Weber  <thakis@chromium.org>

        Reviewed by Dimitri Glazkov.

        Use drag images on OS X as well.
        https://bugs.webkit.org/show_bug.cgi?id=37069

        * src/DragClientImpl.cpp:
        (WebKit::DragClientImpl::startDrag):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@57180 268f45cc-cd09-0410-ab3c-d52691b4dbfc